01/29/2019 — Happy Permutation Day!

Published by MrHonner on

Today we celebrate a Permutation Day! I call days like today permutation days because the digits of the day and the month can be rearranged to form the year.

Celebrate Permutation Day by mixing things up! Try doing things in a different order today. Just remember, for some operations, order definitely matters.

1 Comment

Michael P Goldenberg · January 29, 2019 at 10:54 am

You’re so right. I tried hitting the accelerator in my car, then putting it in gear, and finally turning the key in the ignition: really not effective. Okay, not commutative.

But even associativity failed, as putting it in gear, then accelerating, and finally turning the key was another abject disappointment.

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